Yuen Kay Shan, or Yuen the 5th combined the Wing Chun of both of his teachers, famed constable Fok Bo Chuen, who was feared for his use of the Double Swords and Throwing darts, and Body guard and Bounty Hunter Fung Siu Ching, known as one of the founders of the Look Dim Boon Gwun and master of Kum Na , Sot Gow, and close body methods. He passed his entire system to his only diciple Sum Num.